Introduction

The ECM-2 Excitation Control Module provides the core functions of regulation, input sensing, and

thyristor firing control in a DECS-2100 Digital Excitation Control System. Functions previously provided by

three separate circuit boards in ECS2100 systems are now provided by one compact module. The ECM-2

replaces the Sensor Input Module (SIM), Exciter Control Module (ECM), and Firing Control Interface

Module (FCIM) previously used in ECS2100 systems.

ECM-2 advantages include:

• Fully-enclosed package provides protection of key system circuitry

• Previously-required space for three, separate circuit boards is reduced to one compact module

• The proven reliability of the ECS2100 system design with added functionality:

o Improved thyristor firing accuracy

o Increased number of analog inputs from 12 to 24

o Standard ECM-2 hardware configuration supports up to four power bridges via fiber optic

communications. The expanded fiber optic version can accommodate up to 16 power bridges

o Expanded event recording and data logging capability

o Additional USB port accepts removable storage media for downloading events, data logs,

and alarm logs without the use of a computer

o Cross-current compensation between excitation systems through a built-in communication via

RJ-45 port over Ethernet

o IRIG-B and NTP time synchronization provides synchronized data recording.

o Additional RJ-45. 10BASE-T/100BASE-TX Ethernet port for a dedicated control network

protocol